Failed to parse category definition – How to solve this Elasticsearch exception

Opster Team

August-23, Version: 6.8-8.9

Before you dig into reading this guide, have you tried asking OpsGPT what this log means? You’ll receive a customized analysis of your log.

Try OpsGPT now for step-by-step guidance and tailored insights into your Elasticsearch operation.

Briefly, this error occurs when Elasticsearch is unable to interpret the category definition due to incorrect syntax or format. This could be due to a missing or wrongly placed bracket, incorrect field name, or wrong data type. To resolve this issue, you should first verify the syntax and format of your category definition. Ensure that all brackets are correctly placed, field names are correct, and data types match the expected ones. If the error persists, consider simplifying your category definition to identify the problematic part.

For a complete solution to your to your search operation, try for free AutoOps for Elasticsearch & OpenSearch . With AutoOps and Opster’s proactive support, you don’t have to worry about your search operation – we take charge of it. Get improved performance & stability with less hardware.

This guide will help you check for common problems that cause the log ” failed to parse category definition ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.

Log Context

Log “failed to parse category definition” class name is We extracted the following from Elasticsearch source code for those seeking an in-depth context :

 if (augment) {
 } catch (IOException e) {
 throw new ElasticsearchParseException("failed to parse category definition"; e);
 QueryPage result = new QueryPage<>(


How helpful was this guide?

We are sorry that this post was not useful for you!

Let us improve this post!

Tell us how we can improve this post?